How often is google updated page ranks ?

Do you know when will google update page ranks ?
I think the previous update was 27th June .

Also how often is alexa rank and site linking in updated ?

 

Google updates their PR twice a year. Yes the recent one happened sometime in June and then they made some tweaks. Regarding Alexa, the rank changes based on where you are, within 100k or not. Besides that even i'd like to know how often Alexa updates (when you see an increase/decrease in the sites linking to you).

 

i think thrice in a year.

 

its updated 3-4 times a year

 

Now I cannot say when Google will update the page rank..But Before Google update the page rank after 3 months Now we found that Google is updating all website within 4-6 months..

 

3 times a year

 

Nobody, and I mean nobody knows when Google does a PR update. The last one was June 27 of this year. The PR update for the "toolbars" can be anywhere from six months to eighteen months. They do not update the PR "toolbars" three or four times a year.

 

There isn't a rule. In fact Google have made two updates, on 27th of July and yhe last on 4th of ths month

 

google does not update it twice as the other then previous update was after 9+ months on 24 January 2011 i guess, then 27th june and now 5th of august. so, there are 3 updates and still we have 4 months ahead to end the year.

 

The updates are now made ​​in almost random mode, but I would not give much importance to PR

 

Google PR updation has been done in after 3 month. And 3 to 4 times in every year.

 

With mysite google update in 1 month :-ss
Now google dancing

 

Google PR updation is continue working with last two month. first month, I have got 3 PR for my site and second month I have lost 1 PR. and search engine dancing also effects my results.  

 

There is no fix rule about pr. but last three month google update page rank every month recently google has lunched pr on 4 august 2011.

 

I think ppl should not focus on Page Rank anymore. Because it doesn't mean anything like before. Your SERP has less relevance with PR.